50391500081 has 8 divisors (see below), whose sum is σ = 54921599040. Its totient is φ = 45954805392.

The previous prime is 50391500077. The next prime is 50391500099. The reversal of 50391500081 is 18000519305.

50391500081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 50391500081 - 2² = 50391500077 is a prime.

It is a super-2 number, since 2×50391500081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50391500581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23349941 + ... + 23352098.

It is an arithmetic number, because the mean of its divisors is an integer number (6865199880).

Almost surely, 2^50391500081 is an apocalyptic number.

It is an amenable number.

50391500081 is a deficient number, since it is larger than the sum of its proper divisors (4530098959).

50391500081 is a wasteful number, since it uses less digits than its factorization.

50391500081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46702135.

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 50391500081 in words is "fifty billion, three hundred ninety-one million, five hundred thousand, eighty-one".